Nipple-threading machine.



H. L. FISHER.'

' NIPPLETHREAnmG MACHINE.

PPLICHON FILED AUG. 3. |913.

1,251,209. Patented Dee. 25,1917.

2 SHEETS-SHEET 2.

' UNITED 'STATES PA HENRY L. FISHER, OF WAYNES'BORO, PENNSYLVANIA, ASSIGNDR TG LANDES MACHENE COMPANY, 0F WAYNESBORO, PENNSYLVANIA, A COBPORATEON 0F PENNSYLVNXA..

Specification of Letters Patent.

NIPPLE-THREADING MACHINE,

Patented nee. as, asia Application led August 13, 1918. Serial No. 784,55?.

Taall 'whom t may concern.'

Be it known that I, HENRY L. FISHER, a

`citizen of the United' States, residing at Waynesboro, Franklin county, and. State of Pennsylvania, have invented and discovered certain new and useful Improvements in lNipple-Threadingl Machines, of which the chine of this class for the manufacture of pipe nipplesl upon which the threads are conical and by which both ends of the nipples may be'threaded without removing the said nipple from the machine.

Another object is to provide a machine which will thread a length of pipe and cut the same. into the required lengths for such nipples.

A still further object is to provide a machine for either close or spaced nipples, the term spaced in this instance meaning anipple fc use between two lengths of pipe which it is desired to space apart.A

With this and lother objects in view the invention consists of the novel combination and arrangement of parts hereinafter more fully described and illustrated in the accompanying drawings.

Referring now to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts, l Y

Figure l is a side. elevation of a nipple machine embodying the present invention,

Fig. 2 an enlarged tizinsverse section through a portion of the machine looking to'- ward the die head,

Fig. 3 a detail side elevation ofthe subject matter of Fig. 2,

Fig. 4 an enlarged section of the antifriction bearing for supporting thevnipple while it is being cut,

Fig. 5 an end view of the beveled chaser,

Fig. G a face view of the same, and

Fig. 7 a view of a section of pipe after threaded and ready to he cut into nipples.

In said drawings the portions marked A represent the base or frame of the machine, B a cone pulley, and C the head-stock, these features being common in machines of this type and of a well known construction and arrangement.

The die head l is mounted in the usual or any preferred manner on a base 2 mounted on a carriage D, which carriage is mounted to he moved longitudinallf,7 on the bed of the machine.

A hand wheel 39 on a cross shaft connect ed by a suitable gearing (not shown) with said carriage provides means for moving or feeding said carriage by hand, while an op erating screw 40 connected to driving shaft il through suitable gearing (outlined hy dotted lines) mounted under hood 4t2, .provides for the feed or longitudinal movement of said carriage by power. Said carriage is geared to said screw through the medium of a half-nut 43 carried by a lever 44 on a pivot 45, said lever being in turn pivoted to the carriage on a pivot d6. On the outer end said lever 44tyis provided. with a latch 47 adapted to engage a catch 48 on the outer end of the carriage. Said latch 47 is mounted on a. pivot 49 and is adapted for slight independent movement so that the operator hy grasping the outer ends of said latch and lever may throw the latch out of engagement with said catch. A sliding rod 50 is mounted in perforationsin lugs 5l and 52 and a spring 53 is interposed between lug 52 and propriate distance therefrom on said rod which normally holds said rod in a forward position. The rear end of said rod is adapted to strike the face of latch 47 when forced rearwardlyand disengage the same from catch 48. A strike fnis mounted on the frame in a position to Contact with the inner end of rod 50 when the carriage has moved to the point where the work is coni- 'pleted Said rod is thereby forced rearwardly, disengaging latch i7 and permitting a stift` coiled spring 55A to force' a plunger 56 (mounted in a vertical socket in part 52) upwardly against the under side of lever 44 and elevate said lever and at the same time elevate the nut part 43, disengaging its threads from the threads of the operating screw 40. By this means the forward feed of the carriage is stopped at the` desired4 point, which occurs at the. same time. the' threading die is opened, as will be preeentiy described.

Mounted upon the die head are a plurality of -chaser holders 3 which are `pivoted at fil' in order that they may he toward a collar located an apr.

,and from the center of the head so as to increase or diminish the distance between the points of the chasers 6. The Chaser holders are so connected to thoring 7 of s the die heed that when said ring is revolved it will cause the points 5 of the chasers to move toward'y and from each other in the manner previously mentioned. All of the mechanism inst described. 1ith the excep- 10 tion of the chase i., may be of any preferred construction, the details not beingclaimed in the present application and therefore not described only as necessary to maire the operation o1 the features constituting my said invention clearly understood.

An arm 8 is rigidly connected to one side of ring 7 and extends outward therefrom in a horizontal direction and carries an adjustable screw 9 in its outer end which is 2o provided with a jam-nut 10 by which it may be looked in any desired adjustment. A braclret 22 is secured to carriage l) adjacent to the die-head and has a vertical socket l2 in'which-a plunger is mounted and adapted 25 to reciprocate. The lower end of said screw 9 is adapted. to normally rest upon the upper end of said plunger. A pin le carried by the plunger il and movable within a slot l5 of the sleeve 2 serves to prevent rotation 39 of the said plunger and limit its downward movement. u Pivoted to the lower end oithe plunger at i6 is an arm 17, the free end of which is bifurcatedyand mounted within said bifurcation is a roller 18. A cam 3 9 is '35 mounted on the bed A beneath the roller 18.

and in the path thereof. said cam having two oppositely inclined suri'aces 2O upon which the roller is adapted to ride as carriage D moves back and forth. A. roller 23 a() is mounted 'on the lower end of the bracket 22 and bears against the under edge of ledge 21 and servesto steady the operation of the parts.' A. stop :26 is adjustably mounted in the side of bracket 22, adjacent to pivo'ted arm l?, and serves to limit the inward movement of said arm.

lt will be apparent from reference to Figs. 2 and 3 et the drawings, that a movement or. the carriage D in the direction of the arrow will cause the roller 18 to ride upward upon the incline 2O of the cam 19, causing a like upward movement of the plunger ll and the arm 8. This movement through the cam ring will cause the turnss ing oi' the Chaser holders 3 upon their pivots l and swingT the points 5 ot the chasers 5 inward contracting the die. W hen the roller i8 reaches the apex 27 of the cam it descend upon the opposite'incline a downward movement oiE the h is Jfollowed by the arm 8 chascr points to move cuts the pipe of which the nipples reid in chuck C and passes ne opening 28 oitne 2.331%) 'io e5 through :casacca and the carriage l) moves back and forth,

it will be obvious that the points 5 of the chasers out away more or less of the pipe as they .are moved toward or from the center of the said opening by the above operation and the threaded ends of the nipples will thus be formed tapered or conical. When each nipple is finished the carriage is stopped in its forward movement.

Upon a reverse movement of the carriage D the roller 18 will ride over the inclines 20 without affecting the plunger 11 owing to the pivoted connection i6 between said arm and plunger. I

The chasers 6 are provided with double so inclined grooved faces 29 with a central longitudinal apex. rlhese faces, together with the contracting and expanding movement of the points 5- of said chasers serve to :form a double conical threaded portion. 35 30 upon the pipe as will be seen by reference to Fig. 7 of the drawing. These double conical portions are formed along the length of the pipe and may be formed contin'u. ously andthe pipe cut into lengths suitable 9e for nipples while it still remains in position uponlthe machine. The pipe is then cut into sections forming the nipples, the cut being made at the smallest diameter of the threaded portion, as on the dotted line 95 afi-ec, shown in Fig. blank space 31 may be lett between the highest points of the threads to provide for a spaced nipple 'when desired.A

The cutting of the pipe into nipple lengths 10o may be pertormed by any or the Well known means, a. cutter 32 adaptedfor this purpose and to operate alternately with the thread-v ing mechanism, [being shown in a general w y only in Fig. l of the drawings, being A05 mounted on a carriage 38 adjustable longitudinally the bed to suit diiierent lengths ot nipples.;

in. order that the threaded end of th/e pipe may be securely held without damage to the threads while the cutting operation taires place, an anti-friction bearing, shown detail in li1 ig. 4l, is also mounted on said carriage 38 positioned to receive and support the section of pipe projecting through 115 the die. This anti-'friction bearingconsists of a circular member 33 located between the cutter head l and the cutting oil' element This circular member islstatior. '-.ry and is provided upon its interior with a rotatable 12.0 ring 3e, Said ring being provided with a plurality of raceways 35 tor anti-friction balls 36, end rings 3T serving to hold the ring- 3ft i position. A split bushing 3S adapted to bI slightly compressed so as to friction* ally engage and rotate with the threaded end of 'the pipe rests Within the ring 34. This construction provides for securely holdingq pipe end while being cut into nipple lengths, at the some time allowing said pipe to freely rotate. By providing differentr sized bushings the same bearing may be used with different sized pipes.

Having thus fully described my said invention, what l claim as new, and desire to secure by Letters Patent is:

1. A nipple making machine. comprising a die head, double tapered chasers mounted .on said die head, and means for automatically operating said chasers toward and from the center of the die during the process of threading the Work.

2. A nipple making machine comprising a frame, a carriage, a die .head on said carriage, means for reciprocating said carriage back and forth, chasers pivotally mounted upon said die head, means for-automatically closing the die, and means for continuously moving the chasers into and out of the Work during operation as the carriage reciprocates back and forth,J substantially as set forth.

3. A nipple making machine comprising a die-head, double tapered chasers mounted on said die-head, and means for operating said chasers toward and from the center of the die While cutting'. i

4. A nipple making machine comprising a die-head, chasers pivotally mounted upon said die-head, said chasers being provided with a double inclined face, and means for automatically moving said chasers upon and in the piane of their Asupports during operation.

5. A nipple making machine comprising a die-head, double-faced chasers pivotally mounted upon said die-head, and a cam 0perated mechanism for causing said chasers lto move upon their pivots While operating.

A6. A nipple making mahine comprising a die-head, chasers pivotally mounted upon 'said die-head, an arm extending from said die-head, and connection between said arm and chasers, a plunger located adjacent said arm and operatively connected thereto, and a cam for operating said 'plunge 7. AA nipple making machine compifising a die-head,`cliasers pivoted upon said diehead, an arm extending from said die-head, and connection between said arm and chasers, a plunger located adjacentl to and connecting with said arm, and a double in# clined cam for operating said plunger.

8. A nipple making machine comprising a 'rame, a reciprocating' carriage, a die head on said carriage, chasers mounted upon said die headand means for moving said chasers toward and from the center ot the die operated hy the reciprocation of said carriage, substantially as setl forth.

9. A nipple making machine comprising a carriage, die-head mounted on the carriage, chasers mounted upon said die-head, plunger connected to actuate the die-head, a cam for operating the plunger to position said chasers with respect tothe Work, vand means associated With thel carriage for steadying the operation of said Working parts, substantially as sety forth.

l0. A nipple making machine comprising al carriage, means for reciprocating the carriage, a die-head mounted on the carriage, chasers pivotally mounted upon said diehead, a plunger connected to actuate the diehead, and a double cam for automatically operating the plunger through the reciprocat-ions of said carriage toposition said chasers with respect to the Work, substantially as set forth. i

ll. A nipple making machine comprising a die-head', a chaser pivotally mounted. on the die-heady and having double inclined cutting faces for forming screw-threads, and means` for automatically moving the Chaser to and from the center of the diehead during the process of threading the Work, substantially as set forth.

ln Witness whereof, I have hereunto set my'hand and seal at `lfayneslmre, Pennsyl venia this 25th day of July, A. D. nineteen hundredand thirteen.

HENRY L. sienne. [n e] Witnesses 1 l Baiona Canaan, dossier-HNE ROLLMAN. 

